FROM rust:latest

# define libsodium library environment variables
ENV libsodium libsodium-1.0.15
ENV libsodium_file ${libsodium}.tar.gz

# download libsodium and its signature
WORKDIR /usr/local/src
RUN wget https://download.libsodium.org/libsodium/releases/${libsodium_file}
RUN wget https://download.libsodium.org/libsodium/releases/${libsodium_file}.sig

# import libsodium's author's public key
# from https://download.libsodium.org/doc/installation/
RUN echo '-----BEGIN PGP PUBLIC KEY BLOCK-----\n\
Version: GnuPG v1 (OpenBSD)\n\
\n\
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=Hkmu\n\
-----END PGP PUBLIC KEY BLOCK-----\n'\
> pub.key
RUN gpg --import pub.key
RUN gpg --verify ${libsodium_file}.sig

# install libsodium
RUN tar zxvf ${libsodium_file} && rm ${libsodium_file}
WORKDIR ${libsodium}
RUN ./configure && make && make install

# set environment variable
ENV LD_LIBRARY_PATH /usr/local/lib:${LD_LIBRARY_PATH}

# pre-fetch dependencies
RUN mkdir /usr/local/src/zbox
WORKDIR /usr/local/src/zbox
COPY Cargo.toml ./
COPY src ./src
RUN cargo fetch
RUN rm -rf /usr/local/src/zbox

# set working dir
WORKDIR /zbox
